package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.context.BaseContext;
import com.sky.dto.*;
import com.sky.entity.*;
import com.sky.exception.AddressBookBusinessException;
import com.sky.exception.OrderBusinessException;
import com.sky.exception.ShoppingCartBusinessException;
import com.sky.mapper.*;
import com.sky.result.PageResult;
import com.sky.service.OrderService;
import com.sky.utils.HttpClientUtil;
import com.sky.utils.WeChatPayUtil;
import com.sky.vo.OrderPaymentVO;
import com.sky.vo.OrderStatisticsVO;
import com.sky.vo.OrderSubmitVO;
import com.sky.vo.OrderVO;
import com.sky.websocket.WebSocketServer;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import javax.annotation.Resource;
import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.*;
import java.util.stream.Collectors;

@Service
public class OrderServiceImpl implements OrderService {

    @Resource
    private OrderMapper orderMapper;
    @Resource
    private OrderDetailMapper orderDetailMapper;
    @Resource
    private AddressBookMapper addressBookMapper;
    @Resource
    private ShoppingCartMapper shoppingCartMapper;
    @Resource
    private WeChatPayUtil weChatPayUtil;
    @Resource
    private UserMapper userMapper;
    @Resource
    private WebSocketServer webSocketServer;
    @Value("${sky.shop.address}")
    private String shopAddress;
    @Value("${sky.baidu.ak}")
    private String ak;

    // 用户下单
    @Transactional
    public OrderSubmitVO submitOrder(OrdersSubmitDTO ordersSubmitDTO) {

        // 处理业务异常 (地址为空, 购物车数据为空)
        AddressBook addressBook = addressBookMapper.getById(ordersSubmitDTO.getAddressBookId());
        if (addressBook == null) {
            throw new AddressBookBusinessException(MessageConstant.ADDRESS_BOOK_IS_NULL);
        }

        // 检查用户的收获地址是否超出配送范围
        checkAddress(addressBook.getCityName() + addressBook.getDistrictName() + addressBook.getDetail());

        Long userId = BaseContext.getCurrentId();
        ShoppingCart shoppingCart = new ShoppingCart();
        shoppingCart.setUserId(userId);
        List<ShoppingCart> shoppingCartList = shoppingCartMapper.list(shoppingCart);
        if (shoppingCartList == null || shoppingCartList.isEmpty()) {
            throw new ShoppingCartBusinessException(MessageConstant.SHOPPING_CART_IS_NULL);
        }

        // 向订单表插入一条数据
        Orders orders = new Orders();
        BeanUtils.copyProperties(ordersSubmitDTO, orders);
        orders.setOrderTime(LocalDateTime.now());
        orders.setPayStatus(Orders.UN_PAID);
        orders.setStatus(Orders.PENDING_PAYMENT);
        orders.setNumber(String.valueOf(System.currentTimeMillis()));
        orders.setPhone(addressBook.getPhone());
        orders.setConsignee(addressBook.getConsignee());
        orders.setUserId(userId);

        String orderAddress = addressBook.getProvinceName() + addressBook.getCityName() + "-" + addressBook.getDetail();
        orders.setAddress(orderAddress);
        orderMapper.insert(orders);

        // 向订单明细表插入 n 条数据
        List<OrderDetail> orderDetailList = new ArrayList<>();
        for (ShoppingCart cart : shoppingCartList) {
            OrderDetail orderDetail = new OrderDetail();
            BeanUtils.copyProperties(cart, orderDetail);
            orderDetail.setOrderId(orders.getId());
            orderDetailList.add(orderDetail);
        }
        orderDetailMapper.insertBatch(orderDetailList);

        // 清空当前用户的购物车数据
        shoppingCartMapper.deleteByUserId(userId);
        // 封装VO返回结果
        return OrderSubmitVO.builder()
                .id(orders.getId())
                .orderTime(orders.getOrderTime())
                .orderNumber(orders.getNumber())
                .orderAmount(orders.getAmount())
                .build();
    }

    // 获取地址数据
    // 百度地图 API 地址
    // https://lbsyun.baidu.com/apiconsole/center
    private String getAddress(String address) {
        HashMap<String, String> params = new HashMap<>();
        params.put("ak", ak);
        params.put("output", "json");
        params.put("address", address);

        String url = "https://api.map.baidu.com/geocoding/v3?";

        String coordinate = HttpClientUtil.doGet(url, params);

        JSONObject jsonObject = JSON.parseObject(coordinate);
        if (!jsonObject.getString("status").equals("0")) {
            throw new OrderBusinessException("店铺地址解析失败");
        }

        // 数据解析
        JSONObject location = jsonObject.getJSONObject("result").getJSONObject("location");

        return location.getString("lat") + "," + location.getString("lng");
    }

    // 检查客户的收货地址是否超出配送范围
    private void checkAddress(String address) {
        HashMap<String, String> map = new HashMap<>();
        map.put("ak", ak);
        String shopLngLat = getAddress(shopAddress);
        String userLngLat = getAddress(address);
        map.put("origin", shopLngLat);
        map.put("destination", userLngLat);
        map.put("steps_info","0");

        String url = "https://api.map.baidu.com/directionlite/v1/driving?";

        // 获取路线规划下的距离
        String json = HttpClientUtil.doGet(url, map);
        JSONObject jsonObject = JSON.parseObject(json);
        if (!jsonObject.getString("status").equals("0")) {
            throw new OrderBusinessException("配送路线规划失败");
        }

        //数据解析
        JSONObject result = jsonObject.getJSONObject("result");
        JSONArray jsonArray = (JSONArray) result.get("routes");
        Integer distance = (Integer) ((JSONObject) jsonArray.get(0)).get("distance");

        if (distance > 5000) {
            // 配送距离大于5000
            throw new OrderBusinessException("超出配送范围");
        }
    }

    /**
     * 订单支付
     *
     * @param ordersPaymentDTO
     * @return
     */
    public OrderPaymentVO payment(OrdersPaymentDTO ordersPaymentDTO) throws Exception {
        // 当前登录用户id
        Long userId = BaseContext.getCurrentId();
        User user = userMapper.getById(userId);

        //调用微信支付接口，生成预支付交易单
        JSONObject jsonObject = weChatPayUtil.pay(
                ordersPaymentDTO.getOrderNumber(), //商户订单号
                new BigDecimal("0.01"), //支付金额，单位 元
                "苍穹外卖订单", //商品描述
                user.getOpenid() //微信用户的openid
        );

        if (jsonObject.getString("code") != null && jsonObject.getString("code").equals("ORDERPAID")) {
            throw new OrderBusinessException("该订单已支付");
        }

        OrderPaymentVO vo = jsonObject.toJavaObject(OrderPaymentVO.class);
        vo.setPackageStr(jsonObject.getString("package"));

        return vo;
    }

    /**
     * 支付成功，修改订单状态
     *
     * @param outTradeNo
     */
    public void paySuccess(String outTradeNo) {

        // 根据订单号查询订单
        Orders ordersDB = orderMapper.getByNumber(outTradeNo);

        // 根据订单id更新订单的状态、支付方式、支付状态、结账时间
        Orders orders = Orders.builder()
                .id(ordersDB.getId())
                .status(Orders.TO_BE_CONFIRMED)
                .payStatus(Orders.PAID)
                .checkoutTime(LocalDateTime.now())
                .build();

        orderMapper.update(orders);

        // 通过 websocket 向客户端浏览器推送消息
        // 1表示商家接单, 2表示客户催单
        Map<Object, Object> map = new HashMap<>();
        map.put("type", 1);
        map.put("orderId", ordersDB.getId());
        map.put("content", "订单号" + outTradeNo);
        String json = JSON.toJSONString(map);
        webSocketServer.sendToAllClient(json);
    }

    // 历史订单查询
    public PageResult pageQuery(int pageNum, int pageSize, Integer status) {
        PageHelper.startPage(pageNum, pageSize);
        OrdersPageQueryDTO ordersPageQueryDTO = new OrdersPageQueryDTO();
        ordersPageQueryDTO.setUserId(BaseContext.getCurrentId());
        ordersPageQueryDTO.setStatus(status);

        try (Page<Orders> page = orderMapper.pageQuery(ordersPageQueryDTO)) {

            ArrayList<OrderVO> list = new ArrayList<>();
            if (page != null && !page.isEmpty()) {
                for (Orders orders : page) {
                    Long ordersId = orders.getId();
                    List<OrderDetail> orderDetails = orderDetailMapper.getByOrderId(ordersId);

                    OrderVO orderVO = new OrderVO();
                    BeanUtils.copyProperties(orders, orderVO);
                    orderVO.setOrderDetailList(orderDetails);

                    list.add(orderVO);
                }
            }
            assert page != null;
            return new PageResult(page.getTotal(), list);
        }
    }

    // 查询订单详情
    public OrderVO orderDetail(Integer id) {
        Orders orders = orderMapper.getById(id);

        OrderVO orderVO = new OrderVO();
        BeanUtils.copyProperties(orders, orderVO);

        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orderVO.getId());
        orderVO.setOrderDetailList(orderDetailList);

        return orderVO;
    }

    // 取消订单
    public void userCancelById(Integer id) throws Exception {
        Orders ordersDB = orderMapper.getById(id);

        // 订单不存在
        if (ordersDB == null) {
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }

        // 订单不处于待接单或者待支付状态需要联系商家
        if (ordersDB.getStatus() > 2) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders orders = new Orders();
        orders.setId(ordersDB.getId());
        // 订单处于待接单状态下取消，需要进行退款
        if (ordersDB.getStatus().equals(Orders.TO_BE_CONFIRMED)) {
            //调用微信支付退款接口
            weChatPayUtil.refund(
                    ordersDB.getNumber(), //商户订单号
                    ordersDB.getNumber(), //商户退款单号
                    new BigDecimal(0.01),//退款金额，单位 元
                    new BigDecimal(0.01));//原订单金额

            //支付状态修改为 退款
            orders.setPayStatus(Orders.REFUND);
        }
        orders.setStatus(Orders.CANCELLED);
        orders.setCancelReason("用户取消");
        orders.setCancelTime(LocalDateTime.now());
        orderMapper.update(orders);
    }

    // 再来一单
    public void repetition(Integer id) {
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId((long) id);
        Long userId = BaseContext.getCurrentId();

        // 将订单详情对象转换为购物车对象
        List<ShoppingCart> shoppingCartList = orderDetailList.stream().map(x -> {
            ShoppingCart shoppingCart = new ShoppingCart();

            // 将原订单详情里面的菜品信息重新复制到购物车对象中
            BeanUtils.copyProperties(x, shoppingCart);
            shoppingCart.setUserId(userId);
            shoppingCart.setCreateTime(LocalDateTime.now());

            return shoppingCart;
        }).collect(Collectors.toList());

        shoppingCartMapper.insertBatch(shoppingCartList);
    }

    // 搜索订单
    public PageResult conditionSearch(OrdersPageQueryDTO ordersPageQueryDTO) {
        PageHelper.startPage(ordersPageQueryDTO.getPage(), ordersPageQueryDTO.getPageSize());
        Page<Orders> page = orderMapper.pageQuery(ordersPageQueryDTO);

        // 将 Orders 模型转换为 OrderVo 模型
        List<OrderVO> orderVOList = getOrderVOList(page);
        return new PageResult(page.getTotal(), orderVOList);
    }

    // 将 Orders 模型转换为 OrderVo 模型
    public List<OrderVO> getOrderVOList(List<Orders> orders) {
        ArrayList<OrderVO> orderVOS = new ArrayList<>();
        for (Orders order : orders) {
            OrderVO orderVO = new OrderVO();
            BeanUtils.copyProperties(order, orderVO);
            // 获取菜品信息字符串
            String orderDishes = getOrderDishesStr(order);

            orderVO.setOrderDishes(orderDishes);
            orderVOS.add(orderVO);
        }
        return orderVOS;
    }

    // 获取菜品信息字符串
    public String getOrderDishesStr(Orders orders) {
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orders.getId());
        List<String> orderDishList = orderDetailList.stream().map(x -> x.getName() + "*" + x.getNumber() + ";").collect(Collectors.toList());

        return String.join("", orderDishList);
    }

    // 各个状态的订单数量统计
    public OrderStatisticsVO statistics() {
        Integer toBeConfirmed = orderMapper.countStatus(Orders.TO_BE_CONFIRMED);
        Integer confirmed = orderMapper.countStatus(Orders.CONFIRMED);
        Integer deliveryInProgress = orderMapper.countStatus(Orders.DELIVERY_IN_PROGRESS);

        OrderStatisticsVO orderStatisticsVO = new OrderStatisticsVO();
        orderStatisticsVO.setToBeConfirmed(toBeConfirmed);
        orderStatisticsVO.setConfirmed(confirmed);
        orderStatisticsVO.setDeliveryInProgress(deliveryInProgress);

        return orderStatisticsVO;
    }

    // 接单
    public void confirm(OrdersConfirmDTO ordersConfirmDTO) {
        Orders orders = Orders.builder()
                .status(Orders.CONFIRMED)
                .id(ordersConfirmDTO.getId())
                .build();
        orderMapper.update(orders);
    }

    // 拒单
    public void rejection(OrdersRejectionDTO ordersRejectionDTO) throws Exception {
        Integer orderId = Math.toIntExact(ordersRejectionDTO.getId());
        Orders orders = orderMapper.getById(orderId);

        if (orders == null || !Objects.equals(orders.getStatus(), Orders.TO_BE_CONFIRMED)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        // 待接单状态先退款
        //支付状态
        Integer payStatus = orders.getPayStatus();
        if (Objects.equals(payStatus, Orders.PAID)) {
            //用户已支付，需要退款
            String refund = weChatPayUtil.refund(
                    orders.getNumber(),
                    orders.getNumber(),
                    new BigDecimal("0.01"),
                    new BigDecimal("0.01"));
        }

        Orders orderDB = new Orders();
        orderDB.setId(orders.getId());
        orderDB.setStatus(Orders.CANCELLED);
        orderDB.setCancelTime(LocalDateTime.now());
        orderDB.setCancelReason(ordersRejectionDTO.getRejectionReason());
        orderMapper.update(orderDB);
    }

    // 取消订单
    public void cancel(OrdersCancelDTO ordersCancelDTO) throws Exception {
        Orders orders = orderMapper.getById(Math.toIntExact(ordersCancelDTO.getId()));

        if (Objects.equals(orders.getPayStatus(), Orders.PAID)) {
            //用户已支付，需要退款
            String refund = weChatPayUtil.refund(
                    orders.getNumber(),
                    orders.getNumber(),
                    new BigDecimal("0.01"),
                    new BigDecimal("0.01"));
        }

        Orders ordersDB = new Orders();
        ordersDB.setId(ordersCancelDTO.getId());
        ordersDB.setStatus(Orders.CANCELLED);
        ordersDB.setCancelTime(LocalDateTime.now());
        ordersDB.setCancelReason(ordersCancelDTO.getCancelReason());
        orderMapper.update(ordersDB);
    }

    // 派送订单
    public void delivery(Long id) {
        Orders orders = orderMapper.getById(Math.toIntExact(id));

        if (orders == null || !orders.getStatus().equals(Orders.CONFIRMED)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders ordersDb = new Orders();
        ordersDb.setId(id);
        // 更新订单状态为派送中
        ordersDb.setStatus(Orders.DELIVERY_IN_PROGRESS);
        orderMapper.update(ordersDb);
    }

    // 完成订单
    public void complete(Long id) {
        Orders orders = orderMapper.getById(Math.toIntExact(id));

        if (orders == null || !orders.getStatus().equals(Orders.DELIVERY_IN_PROGRESS)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders ordersDb = new Orders();
        ordersDb.setId(id);
        // 更新订单状态为已送达
        ordersDb.setStatus(Orders.COMPLETED);
        ordersDb.setDeliveryTime(LocalDateTime.now());
        orderMapper.update(ordersDb);
    }

    // 催单
    public void reminder(Integer id) {
        Orders orderDb = orderMapper.getById(id);
        if (orderDb == null) {
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }

        HashMap<Object, Object> map = new HashMap<>();
        map.put("type", 2);
        map.put("orderId", id);
        map.put("content", "订单号" + orderDb.getNumber());

        webSocketServer.sendToAllClient(JSON.toJSONString(map));
    }
}
